Dietrich I
Dietrich I, or Theodoric I, may refer to:
- Theodoric I of Wettin
- Dietrich I of Metz
- Dietrich I, [Duke of Upper Lorraine]
- Dietrich I, [Count of Cleves]
- Dietrich I, [Margrave of Lusatia]
- Theodoric I, Margrave of Meissen
- Dietrich I [von Hengebach]
- Dietrich I of Isenberg
- Dietrich [Schenk von Erbach]